Shower cubicle grout failure - do I need to start again?

[Pangloss]

Back in May I re-sealed the gap between the tray and the tiles using Dow-Corning bathroom sealant.

I also replaced the grouting in the corners of the shower cubicle using an epoxy grout.

As you can see from the images the grouting has cracked in one of the corners allowing water to get behind the sealant.

Am I correct in thinking that because sealant wont adhere to sealant, I am going to have to reseal the entire shower cubicle, only this time applying sealant up the corners where the tiles meet?

Otherwise, does anyone have a better suggestion?

 

[Burnerman]

Remove all of the old sealant and start again, I'm afraid......a really sharp blade will help you here.
A vertical seam up that tiled corner will help too.
John

 

[Lee@TileTown]

Corners of a shower (or any corners) shouldnt be grouted, they should be silicone.

 

[chappers]

as Lee says corners should be silicone after grouting as a matter of course.

 

[Pangloss]

Thanks all. Lesson learned and cubicle completely re_sealed.